Siemens / ITE QP1B020 Miniature Circuit Breaker
- 20A
- 1 Pole
- Plug-On
Quantity
Siemens / ITE QP1B020 - 20A 1 Pole Miniature Circuit Breaker
New
Quantity
Description
A drop-in replacement for older electrical systems, the Siemens QP1B020 is a 1-pole, 20A miniature circuit breaker. It is specifically designed to fit seamlessly into legacy ITE, Gould, Murray, and Siemens load centers without the need for mounting adapters. Rated for 10kAIC at 120/240V, this plug-on breaker features standard thermal-magnetic trip technology and is HACR and SWD rated for switching fluorescent lighting loads. It serves as an exact substitute for the modern Q120 and MP120 SKUs.Specifications
| Brand | Siemens / ITE |
|---|---|
| Part Number | QP1B020 |
| Series | QP |
| Amperage | 20A |
| Poles | 1 |
| Mounting Style | Plug-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens Load Centers, ITE Load Centers, Gould Load Centers, Murray Load Centers |
| Wire Gauge | 14-6 AWG (Cu), 14-6 AWG (Al) |
| Max Wire | 6 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Padlock Attachment, Handle Tie |
|---|---|
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Insta-Wire, SWD Rated |
Product FAQs
8 answersIs the QP1B020 the same as a Siemens Q120?
Yes, the QP1B020 is an older ITE and Siemens catalog number that is functionally identical to the modern Siemens Q120. Both are 1-pole, 20A, Type QP miniature circuit breakers.
Which load centers accept the QP1B020 circuit breaker?
This Type QP breaker is designed for plug-on installation in Siemens, ITE, Gould, and Murray load centers. It fits standard PL, ES, and EQ series panels.
Can I use aluminum wire with the QP1B020 breaker?
Yes, the terminal lugs are rated for both copper and aluminum conductors. The breaker accepts wire gauges from 14 AWG to 6 AWG.
Is the QP1B020 suitable for switching fluorescent lighting loads?
Yes, standard 20A Type QP breakers carry an SWD (Switching Duty) rating, making them safe and approved for switching 120V fluorescent lighting circuits.
Does this breaker have an HACR rating for HVAC equipment?
Yes, this 20A thermal magnetic breaker is HACR rated. It is approved for use with heating, air conditioning, and refrigeration equipment that requires this specific protection.
Does this breaker require a mounting adapter for older ITE panels?
No, the QP1B020 features a standard plug-in connection that fits directly into legacy ITE and Gould load centers without any special adapters.
Can I use the QP1B020 to replace a discontinued Murray MP120?
Yes, Siemens Type QP breakers are the manufacturer approved replacements for legacy Murray Type MP-T breakers, including the 20A 1-pole MP120.
How does the thermal magnetic trip mechanism function on this breaker?
The fixed thermal element responds to sustained overloads by heating up and tripping the breaker, while the magnetic element provides instantaneous tripping during severe short circuits.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 26 reviews.
- DTDaniel T.Verified BuyerReviewingSiemens Q380 - 80A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/24/26Great service as always
It is always great to know that when I need a product fast and reliably I can count on SuperBreakers to deliver.
- JRJorge R.Verified BuyerReviewingSiemens Q360 - 60A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars4/7/26Just as promised!
Thank you for delivering my breakers just as you promised!
Great service!
- TQTimothy Q.Verified BuyerReviewingSiemens Q250 - 50A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars3/21/26Great service
My breakers arrived quickly at a good price.
I would definitely use SuperBreakers again.
- JMjesse m.Verified BuyerReviewingSiemens Q36000S01 - 60A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars1/20/26great experience
smooth experience ordering and delivery, thank you
- JFJim F.Verified BuyerReviewingSiemens Q28000S01 - 80A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars12/7/25An OEM product delivered on time for the job.
Won't be chasing all over town to pay an inflated price again. Or spend hours at a counter waiting on the cheapest dummy they could hire to find a product he knows nothing about.